CVE-2018-15859 (NVD)

2018-08-25

Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because lookup failures are mishandled.

Products Ubuntu_linux, Libxkbcommon, Xkbcommon
Type NULL Pointer Dereference (CWE-476)
First patch https://github.com/xkbcommon/libxkbcommon/commit/bb4909d2d8fa6b08155e449986a478101e2b2634
Relevant file/s ./src/xkbcomp/expr.c (modified, +5, -1)
Links • https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
• https://access.redhat.com/errata/RHSA-2019:2079
• https://security.gentoo.org/glsa/201810-05
• https://usn.ubuntu.com/3786-2/
• https://usn.ubuntu.com/3786-1/

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